.app-bg {
  background-color: #f4f4f4 !important;
}

.app-white {
  background-color: white !important;
}

.app-black {
  background-color: black !important;
}

.app-opacity-0 {
  opacity: 0 !important;
}

.app-opacity-10 {
  opacity: 0.1 !important;
}

.app-opacity-20 {
  opacity: 0.2 !important;
}

.app-opacity-30 {
  opacity: 0.3 !important;
}

.app-opacity-40 {
  opacity: 0.4 !important;
}

.app-opacity-50 {
  opacity: 0.5 !important;
}

.app-opacity-60 {
  opacity: 0.6 !important;
}

.app-opacity-70 {
  opacity: 0.7 !important;
}

.app-opacity-80 {
  opacity: 0.8 !important;
}

.app-opacity-90 {
  opacity: 0.9 !important;
}
